Repair plug



FebQlz, 1924.

M. ca. O'BRIEN REPAIR PLUG Filed May 7,

/VENTOR. BY

TTORNEY.

Patented Feb. 12, 124.

NET TD MICHAEL G. OBRIEN, OF BRISTOL, CONNECTICUT.

REPAIR IPLUG.

Application filed May 7,

To all whom it may concern:

Be it known that 1, MICHAEL G. OBninn, a citizen of the United States,and a resident of Bristol, in the county of Hart ford and State ofConnecticut, have invented a new and Improved Repair Plug, of which thefollowing is a specification.

My invention relates more especially to that class of repair plugs usedfor mending boilers and other devices where access cannot be had to theinterior, and an object of my invention, among others, is to provide arepair plug that may be effectively employed to stop a leak in a-boileror like device and one that may be readily inserted in place.

One form of plug embodying my invention and in the construction and useof which the objects herein set out, as well as others, may be attained,is illustrated in the accompanying drawings, in which Figure l is a Viewin section through a portion of boiler showing my improved plug attachedthereto.

Figure 2 is a face View of the same look ing from the outside.

Figure 3 is a view looking from the inside.

In the accompanying drawings the numeral 5 indicates a portion of aboiler or like device adapted to contain fluid, especially liquid, ashot-water, and 6 denotes a hole in the wall thereof, such hole usuallybeing an enlargement of the hole when placed together comprisingathreaded stud. Each member has a foot 9 bent at an angle substantiallyright angle-to the main part so that when the two members are united thefeet extend outwardly in opposite directions and engage the innersurface of the boiler, as clearly shown in Figure 1. A packing 10 islocated between the two members, preferably extending for the Wholelength thereof and a packing washer 11 surrounds the members at the baseof the threaded portions and against the outer surface of the boiler, anut 12 fitting the threaded stud comprising the two members assembled,said nut forcing the packing washer tightly against the outer 1919.Serial No. 295,440.

surface of the boiler to pack the joint thereat. If preferred a metalwasher 13 may be located between the packing washer and the nut toprevent transmission of torsional force from the nut to the washer. Theouter endof the stud comprising the two members be flattened orotherwise angularly formed as at 14 for the purpose of receiving awrench, pliers or other suitable tool to prevent turning movement of thestud when the nut is being screwed to place.

In operation a leak having occurred in a boiler, the hole comprisingthis leak is out out by a suitable tool to form a larger hole 6 and thefeet on the members 7 and 8 are separately inserted through this holeand the two members are then placedtogether as shown in Figure l to formthe stud. The packing washer is placed in position and the nut isscrewed to place. In this screwing of the nut to place should there beany tendency of the stud to turn, a wrench or other suitable tool may beapplied to the flattened portion 10 to prevent such turning movementuntil the nut has been tightened sufliciently. The outer ends of the twomembers 7 and 8 may then be cut off flush with the nut if desired toconstitute a finished job.

In accordance with the provisions of the patent statutes, I havedescribed the principles of operation of my invention, together with thedevice which I new consider to represent the best embodiment thereof;but I desire to have it understood that the device shown is onlyillustrative, and that the invention may be carried out by other means.

ll claim A repair plug comprising a screw threaded stud divided into twomembers, feet extending each at an angle to the main part of each ofsaid members and in opposite directions from the stud as a whole, apacking located between said members and extending from side to sidethereof and lengthwise therealong to the inner end of said member toprevent flow of fluid between the meeting faces of said members, apacking surrounding said members in contact with the edges of thepacking between said members, and a nut to bind said last mentionedpacking in place.

MICHAEL Gr. OBRIEN.

